Information card for entry 9002033

Structure parameters

• Mineral name: Protopyroxene
• Formula: Li0.23 Mg1.54 O6 Sc0.23 Si2
• Calculated formula: Li0.23 Mg1.54 O6 Sc0.23 Si2
• Title of publication: A new pyroxene structure at high pressure: Single-crystal X-ray and Raman study of the Pbcn - P2_1cn phase transition in protopyroxene Sample at P = 2.50 GPa, (Mg1.54Li.23Sc.23)Si2O6
• Authors of publication: Yang, H.; Finger, L. W.; Conrad, P. G.; Prewitt, C. T.; Hazen, R. M.
• Journal of publication: American Mineralogist
• Year of publication: 1999
• Journal volume: 84
• Pages of publication: 245 - 256
• a: 9.1167 Å
• b: 8.7857 Å
• c: 5.1837 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 415.197 ų
• Ambient diffracton pressure: 2500000 kPa
• Number of distinct elements: 5
• Hermann-Mauguin space group symbol: P 21 c n
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No